Shimmer the night away in this long strapless sequin prom dress that is as sparkly as it is captivating. With a corset-style bodice, this long sequin formal dress laces up over the open back for the best fit at prom, galas, and other black-tie events. In misses and plus sizes, this elegant evening gown is fully sequined from the deep v-neckline to the floor, while the hip-hugging long skirt pools into a small train that follows every move. For a sophisticated look that showcases the curves, this long strapless sequin prom dress, under $250, is an upscale choice that won't break the bank. Strapless sequin long fitted gown with sheer side detail.